Revert "net: phylink: add mac_managed_pm in phylink_config structure"

This reverts commit b9122e0e which is
commit 96de900a upstream.

It breaks the kernel api and is not needed at this point in time for
Android devices.  If it is determined to be needed, then it can be
brought back in an abi-safe way in the future.

Bug: 161946584
Change-Id: I14614323da294f4b6313f721934b92946917100f
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>